呼伦湖表层沉积物的磁性矿物组成特征
|
摘要
本文选择内蒙古呼伦湖表层沉积物为研究对象,通过测量沉积物样品的室温下χ-T曲线、等温剩磁获得曲线和反向场退磁曲线、一阶反转曲线(FORC图)以及低温(20～300 K)下剩磁随温度变化曲线、Verwey转变温度,结合电子显微镜分析,获得了样品中磁性矿物组成信息.揭示出呼伦湖表层沉积物中磁性矿物含量较低,以假畴磁铁矿为主,含有部分单畴和多畴颗粒.这些结果对于理解呼伦湖沉积物的磁性信号、古环境和古气候重建等具有研究价值.
Lacustrine-sediment is one of the best sources for environmental magnetic study. Identification of the magnetic minerals(both detrital and biogenic ones) in lake sediments is useful for understanding the magnetic signals and reconstructing paleo-environment and paleoclimate changes. The surface sediments of HuLun Lake in Inner Mongolia, which is the fifth largest freshwater lake of China, were studied using comprehensive rock magnetic measurements, including χ-T curve, magnetization/demagnetization curve of Isothermal Remanent Magnetization(IRM) and First-Order-Reversal Curve(FORC)diagram at room temperature, thermal demagnetization of Saturation Isothermal Remanent Magnetization(SIRM) at low temperature(20～300 K). Besides, transmission electron microscope was used to analyze the morphology of magnetic mineral extracted from the samples. Results indicate that magnetic mineral in recent sediments of HuLun Lake is mainly composed of single domain magnetite and a small amount of multi-domain magnetite. Magentite magnetofossils were found in the samples, showing by at lower temperature of Verwey transition(T_v) and central-ridge feature of the FORC diagrams.
Lacustrine-sediment is one of the best sources for environmental magnetic study. Identification of the magnetic minerals(both detrital and biogenic ones) in lake sediments is useful for understanding the magnetic signals and reconstructing paleo-environment and paleoclimate changes. The surface sediments of HuLun Lake in Inner Mongolia, which is the fifth largest freshwater lake of China, were studied using comprehensive rock magnetic measurements, including χ-T curve, magnetization/demagnetization curve of Isothermal Remanent Magnetization(IRM) and First-Order-Reversal Curve(FORC)diagram at room temperature, thermal demagnetization of Saturation Isothermal Remanent Magnetization(SIRM) at low temperature(20～300 K). Besides, transmission electron microscope was used to analyze the morphology of magnetic mineral extracted from the samples. Results indicate that magnetic mineral in recent sediments of HuLun Lake is mainly composed of single domain magnetite and a small amount of multi-domain magnetite. Magentite magnetofossils were found in the samples, showing by at lower temperature of Verwey transition(T_v) and central-ridge feature of the FORC diagrams.
引文
Cui J P,Ren Z L,Li J X,et al. 2015. Reconstruction of geothermal history in Hulunhu Depression,Hailaer Basin [J]. Oil & Gas Geology (in Chinese),36(1): 35- 42.崔军平,任战利,李金翔,等. 2015. 海拉尔盆地呼伦湖凹陷热演化史恢复[J]. 石油与天然气地质,36(1): 35- 42.
Cui X Y,Yang J,Hao J X,et al. 2015. The formation history and changes of HuLun Lake [J]. Inner Mongolia Science Technology & Economy (in Chinese),(1): 43- 47.崔显义,杨杰,郝建玺,等. 2015. 呼伦湖的形成历史及变迁[J]. 内蒙古科技与经济,(1): 43- 47.
Fu C F,Song Y G,Qiang X K,et al. 2009. Environmental Magnetism and Its Application Progress in Paleoclimatic and Paleoenvironmental Changes [J]. Journal of Earth Sciences and Environment (in Chinese),31(3): 312-322.符超峰,宋友桂,强小科,等. 2009. 环境磁学在古气候环境研究中的回顾与展望[J]. 地球科学与环境学报,31(3): 312-322.
Gu R Y,Li S H,Zhao H Y,et al. 2012. Responses of runoff in Hulun Lake basin of Inner Mongolia to climate change [J]. Chinese Journal of Ecology (in Chinese),31(6): 1517-1524.顾润源,李思慧,赵慧颖,等. 2012. 呼伦湖流域径流对气候变化的响应[J]. 生态学杂志,31(6): 1517-1524.
Han F,Wang F X,Li J H,et al. 2016. Identification of magnetic minerals in surface sediments of Miyun Lake,Beijing [J]. Chinese Journal of Geophysis (in Chinese),59(8): 2937-2948,doi: 10.6038/cjg20160818.韩非,王芙仙,李金华,等. 2016. 北京密云水库表层沉积物磁性矿物的鉴别[J]. 地球物理学报,59(8): 2937-2948,doi: 10.6038/cjg20160818.
Heslop D,Roberts A P,Chang L,et al. 2013. Quantifying magnetite magnetofossil contributions to sedimentary magnetizations [J]. Earth & Planetary Science Letters,382(6): 58- 65.
Hu S Y,Deng C L,E. Appel,et al. 2001. Envirmonment significiance of magnetic porperties of lacustrine sediments [J]. Chinese Science Bulletin (in Chinese),46(17): 1491-1494.胡守云,邓成龙,E.Appel,et al. 2001. 湖泊沉积物磁学性质的环境意义[J]. 科学通报,46(17): 1491-1494.
Kopp R E,Kirschvink J L. 2008. The identification and biogeochemical interpretation of fossil magnetotactic bacteria [J]. Earth Science Reviews,86(1- 4): 42- 61.
Liao Chang,Winklhofer M,Roberts A P,et al. 2013. Low-temperature magnetic properties of pelagic carbonates: oxidation of biogenic magnetite and identification of magnetosome chains [J]. Journal of Geophysical Research Solid Earth,118(12): 6049- 6065.
Lin W,Pan Y X. 2012. Diversity of magnetotactic bacteria and its implications for environment[J].Quaternary Sciences(in Chinese),32(4): 567-575.林巍,潘永信. 2012. 趋磁细菌多样性及其环境意义[J]. 第四纪研究,32(4): 567-575.
Liu Y. 2012. Magnetic properties of tyoical estuarine and coastal sediments in China and its environmental implications [Master’s Dissertation]. Shanghai:East China Normal University.刘莹. 2012. 典型河口和近海沉积物的磁性特征及环境意义[硕士论文]. 上海:华东师范大学.
Liu Z,Liu X M,Li P Y,et al. 2012. The magnetic properties of the bacterial sediments in lake Chiemsee,Germany [J]. Quaternary Sciences (in Chinese),32(4): 820-824.刘植,刘秀铭,李平原,等. 2012. 德国Chiemsee湖磁性细菌干湖泥的磁学性质[J]. 第四纪研究,32(4): 820-824.
Moskowitz B M,Frankel R B,Bazylinski D A. 1993. Rock magnetic criteria for the detection of biogenic magnetite [J]. Earth & Planetary Science Letters,120(3- 4): 283-300.
Pan Y X,Petersen N,Winklhofer M,et al. 2005. Rock magnetic properties of uncultured magnetotactic bacteria [J]. Earth & Planetary Science Letters,237(3- 4): 311-325.
Pan Y X,Zhu R X. 1996. The progress of environmental magnetism [J]. Progress in Geophysics (in Chinese),11(4): 87-99.潘永信,朱日祥. 1996. 环境磁学研究现状和进展[J]. 地球物理学进展,11(4): 87-99.
Roberts A P,Florindo F,Villa G,et al. 2011. Magnetotactic bacterial abundance in pelagic marine environments is limited by organic carbon flux and availability of dissolved iron [J]. Earth & Planetary Science Letters,310(3- 4): 441- 452.
Tian J X,Sun X M,Zhang X Q,et al. 2013. Reservoir space types and the factors influencing the characteristics of spherulite in rhyolite[J].Science China:Earth Sciences(in Chinese),43(9):1410-1417.田景雄,孙晓猛,张旭庆,等. 2013. 流纹岩中球粒储集空间类型及主控因素[J]. 中国科学: 地球科学,43(9): 1410-1417.
Verosub K L,Roberts A P. 1995. Environmental magnetism: Past,present,and future[J].Journal of Geophysical Research Atmospheres,100(B2): 2175-2192.
Yu L Z,Xu Y,Zhang W G. 1995. Magnetic mesurement on lake sediment and its environmental application [J]. Progress in Geophysics (in Chinese),10(1): 11-22.俞立中,许羽,张卫国. 1995. 湖泊沉积物的矿物磁性测量及其环境应用[J]. 地球物理学进展,10(1): 11-22.
Zhang S H,Li H Y. 2004. Progresses of Geomagnetism,Paleomagnetism and Environmental Magnetism: An overview on the presentations in the 32nd international geological congress [J]. Geoscience (in Chinese),18(4): 415- 422.张世红,李海燕. 2004. 地磁学、古地磁学和环境磁学的研究新进展——第32届国际地质大会学科总结和评述[J]. 现代地质,18(4): 415- 422.
Cui X Y,Yang J,Hao J X,et al. 2015. The formation history and changes of HuLun Lake [J]. Inner Mongolia Science Technology & Economy (in Chinese),(1): 43- 47.崔显义,杨杰,郝建玺,等. 2015. 呼伦湖的形成历史及变迁[J]. 内蒙古科技与经济,(1): 43- 47.
Fu C F,Song Y G,Qiang X K,et al. 2009. Environmental Magnetism and Its Application Progress in Paleoclimatic and Paleoenvironmental Changes [J]. Journal of Earth Sciences and Environment (in Chinese),31(3): 312-322.符超峰,宋友桂,强小科,等. 2009. 环境磁学在古气候环境研究中的回顾与展望[J]. 地球科学与环境学报,31(3): 312-322.
Gu R Y,Li S H,Zhao H Y,et al. 2012. Responses of runoff in Hulun Lake basin of Inner Mongolia to climate change [J]. Chinese Journal of Ecology (in Chinese),31(6): 1517-1524.顾润源,李思慧,赵慧颖,等. 2012. 呼伦湖流域径流对气候变化的响应[J]. 生态学杂志,31(6): 1517-1524.
Han F,Wang F X,Li J H,et al. 2016. Identification of magnetic minerals in surface sediments of Miyun Lake,Beijing [J]. Chinese Journal of Geophysis (in Chinese),59(8): 2937-2948,doi: 10.6038/cjg20160818.韩非,王芙仙,李金华,等. 2016. 北京密云水库表层沉积物磁性矿物的鉴别[J]. 地球物理学报,59(8): 2937-2948,doi: 10.6038/cjg20160818.
Heslop D,Roberts A P,Chang L,et al. 2013. Quantifying magnetite magnetofossil contributions to sedimentary magnetizations [J]. Earth & Planetary Science Letters,382(6): 58- 65.
Hu S Y,Deng C L,E. Appel,et al. 2001. Envirmonment significiance of magnetic porperties of lacustrine sediments [J]. Chinese Science Bulletin (in Chinese),46(17): 1491-1494.胡守云,邓成龙,E.Appel,et al. 2001. 湖泊沉积物磁学性质的环境意义[J]. 科学通报,46(17): 1491-1494.
Kopp R E,Kirschvink J L. 2008. The identification and biogeochemical interpretation of fossil magnetotactic bacteria [J]. Earth Science Reviews,86(1- 4): 42- 61.
Liao Chang,Winklhofer M,Roberts A P,et al. 2013. Low-temperature magnetic properties of pelagic carbonates: oxidation of biogenic magnetite and identification of magnetosome chains [J]. Journal of Geophysical Research Solid Earth,118(12): 6049- 6065.
Lin W,Pan Y X. 2012. Diversity of magnetotactic bacteria and its implications for environment[J].Quaternary Sciences(in Chinese),32(4): 567-575.林巍,潘永信. 2012. 趋磁细菌多样性及其环境意义[J]. 第四纪研究,32(4): 567-575.
Liu Y. 2012. Magnetic properties of tyoical estuarine and coastal sediments in China and its environmental implications [Master’s Dissertation]. Shanghai:East China Normal University.刘莹. 2012. 典型河口和近海沉积物的磁性特征及环境意义[硕士论文]. 上海:华东师范大学.
Liu Z,Liu X M,Li P Y,et al. 2012. The magnetic properties of the bacterial sediments in lake Chiemsee,Germany [J]. Quaternary Sciences (in Chinese),32(4): 820-824.刘植,刘秀铭,李平原,等. 2012. 德国Chiemsee湖磁性细菌干湖泥的磁学性质[J]. 第四纪研究,32(4): 820-824.
Moskowitz B M,Frankel R B,Bazylinski D A. 1993. Rock magnetic criteria for the detection of biogenic magnetite [J]. Earth & Planetary Science Letters,120(3- 4): 283-300.
Pan Y X,Petersen N,Winklhofer M,et al. 2005. Rock magnetic properties of uncultured magnetotactic bacteria [J]. Earth & Planetary Science Letters,237(3- 4): 311-325.
Pan Y X,Zhu R X. 1996. The progress of environmental magnetism [J]. Progress in Geophysics (in Chinese),11(4): 87-99.潘永信,朱日祥. 1996. 环境磁学研究现状和进展[J]. 地球物理学进展,11(4): 87-99.
Roberts A P,Florindo F,Villa G,et al. 2011. Magnetotactic bacterial abundance in pelagic marine environments is limited by organic carbon flux and availability of dissolved iron [J]. Earth & Planetary Science Letters,310(3- 4): 441- 452.
Tian J X,Sun X M,Zhang X Q,et al. 2013. Reservoir space types and the factors influencing the characteristics of spherulite in rhyolite[J].Science China:Earth Sciences(in Chinese),43(9):1410-1417.田景雄,孙晓猛,张旭庆,等. 2013. 流纹岩中球粒储集空间类型及主控因素[J]. 中国科学: 地球科学,43(9): 1410-1417.
Verosub K L,Roberts A P. 1995. Environmental magnetism: Past,present,and future[J].Journal of Geophysical Research Atmospheres,100(B2): 2175-2192.
Yu L Z,Xu Y,Zhang W G. 1995. Magnetic mesurement on lake sediment and its environmental application [J]. Progress in Geophysics (in Chinese),10(1): 11-22.俞立中,许羽,张卫国. 1995. 湖泊沉积物的矿物磁性测量及其环境应用[J]. 地球物理学进展,10(1): 11-22.
Zhang S H,Li H Y. 2004. Progresses of Geomagnetism,Paleomagnetism and Environmental Magnetism: An overview on the presentations in the 32nd international geological congress [J]. Geoscience (in Chinese),18(4): 415- 422.张世红,李海燕. 2004. 地磁学、古地磁学和环境磁学的研究新进展——第32届国际地质大会学科总结和评述[J]. 现代地质,18(4): 415- 422.